#!/bin/sh
#set -x 
#用于执行代码追踪
echo -n "Can you write device drivers? "
read answer
answer=`echo $answer | tr [a-z] [A-Z]`
echo $answer
if [ $answer = Y ]
then
    echo "Wow, you must be ver skilled"
else
    echo "Neither can I,I'm just anexample shell script"
fi

if [ 1 = 1 ]
then
    echo 111
fi
